Thickening compositions containing xanthan gum, guar gum and starch
AssigneeMerck & Co., Inc.
InventorJoseph S. Racciato
Life of this patent
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Abstract
A blend of xanthan gum, guar gum, or guar gum derivatives, a starch ether has unique thickening properties. The blend is particularly useful in printing pastes, salad dressings and oil well drilling muds.
Claims9
A thickening composition consisting essentially of from about 5 to about 90 weight % of xanthan gum, from about 5 to about 90 weight % of guar gum, and from about 5 to about 90 weight % of starch ether, the xanthan gum being unmodified by a polyvalent cation and being unmodified by heating in a dry state before blending with the guar gum, the composition exhibiting a synergistic increase in viscosity compared to the additive viscosities of the individual components.
Dependencies are inferred from the claim text.